I had a quick look at the ruleset and it loks pretty neat. I only have two minor remarks:
1. It's not a true powered suit, it's a hydraulic exoskeleton. The +10 TU feels undeserved; if anything, I think it should penalize your TU.
2. The "turnCost: 3" flag is troublesome. I understand the intention to limit the armour's mobility, but modifying the turn cost will made it harder to shoot at anything not directly ahead of you, and I think it's unfair. I believe that "allowsStrafing: false" is punishing enough.